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High7.5Red Hat Linux

High [CVE-2026-42899] .NET: infinite loop allows an attacker to cause a denial of service

This high-severity Red Hat Linux advisory covers CVE-2026-42899 affecting Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions.

CVE-2026-42899 Published May 12, 2026
CVE-2026-42899
Affected products & platforms
Red Hat LinuxUnclassified
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Summary

.NET: infinite loop allows an attacker to cause a denial of service. Red Hat rates this important (CVSS 7.5).

Weakness: CWE-835. Affected package(s): dotnet10.0, dotnet9.0, dotnet8.0, dotnet8, dotnet9, dotnet10.

Resolved in Red Hat advisory RHSA-2026:21291 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.6 Extended Update Support; and 1 more.

Affected versions
  • dotnet10.0-0:10.0.108-1.el8_10
  • dotnet9.0-0:9.0.117-1.el8_10
  • dotnet8.0-0:8.0.127-1.el9_8
  • dotnet8-0-main-8.0.127-1.hum1
  • dotnet8.0-0:8.0.127-1.el10_0
  • dotnet8.0-0:8.0.127-1.el8_10
  • dotnet9.0-0:9.0.117-1.el9_8
  • dotnet9-0-main-9.0.117-1.hum1
  • dotnet9.0-0:9.0.117-1.el9_6
  • dotnet9.0-0:9.0.117-1.el10_0
  • dotnet10.0-0:10.0.108-1.el10_2
  • dotnet9.0-0:9.0.117-1.el10_2

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions
  • RHSA-2026:21291

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Update the affected package(s) to the fixed version shipped in RHSA-2026:21291 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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